Keiper, George F. (1911). A Case of Amblyopia Due to the Ingestion of One Hundred and Twenty Grains of Quinine Sulphate. Reprinted from the Ophthalmic Record, October, 1911, pp. 2-3.
Keiper, George F. (1911). Operations for Cataract Upon the Eyes of the Very Aged. Reprinted from The American Journal of Ophthalmology, November, 1911, pp. 1-7.